防彈背心的英文：
1.a bullet-proof vest

bullet是什么意思：
n. 子弹；解雇通知

We peppered them with bullets.
我们向他们猛烈射击。

The gunman sprayed the building with bullets.
持枪歹徒向那座房子扫射。

Every Bullet has its Billet
生死有命,富贵在天

proof是什么意思：
n. 证据，证明，证实，验算，校样， (酒的）标准酒精度
adj. 能抵御的，能防护的，防…的，抗…的
v. 做防护处理，印校样，校对

First proof: The earliest proof used for checking by proof readers.
初稿:给校对员校对的最先稿样。

Rough proof: Proof for identification rather than reading.
粗稿样:只用来辨认，不作校对的稿样。

Clean proof: A printer's proof in which there are no errors.
清样:没有错漏的稿样.

vest是什么意思：
n. 马甲，背心，坎肩
v. 属于，归属

A right was then not vested in anyone.
权利当时不属于任何人。

I have a cellular vest.
我有一件网眼背心。

He has vested this committee with certain power.
他已授予这个委员会某种特定的权力。